Page 379 - Materials Chemistry, Second Edition

L1644_C08.fm Page 341 Tuesday, October 21, 2003 3:03 PM

TABLE 8.21
Isopentane Separation Process Impact Assessment Obtained with TEAM
TM
Software
Characterization
Impacts TOTAL
factors
+
CML air acidification (g equiv. H ) 4.14 × 10 1
(a) Nitrogen oxides (NO x as NO 2 ) 2.17 × 10 –2 9.67
(a) Sulfur oxides (SO x as SO 2 ) 3.12 × 10 –2 3.17 × 10 1
CML eutrophication (g equiv. PO 4 ) 5.78 × 10 1
(a) Nitrogen oxides (NO x as NO 2 ) 1.30 × 10 –1 5.78 × 10 1
(w) COD (chemical oxygen demand) 2.20 × 10 –2 2.02 × 10 –5
CML human toxicity (g) 2.47 × 10 4
(a) Carbon monoxide (CO) 1.20 × 10 –2 5.50 × 10 –4
(a) Lead (Pb) 1.60 × 10 2 2.31 × 10 4
(a) Mercury (Hg) 1.20 × 10 2 4.13 × 10 1
(a) Nitrogen oxides (NO x as NO 2 ) 7.80 × 10 –1 3.47 × 10 2
(a) Sulfur oxides (SO x as SO 2 ) 1.20 1.22 × 10 3
IPCC greenhouse effect (direct, 100 years) (g equiv.
2.18 × 10 5
CO 2 )
(a) Carbon dioxide (CO 2 , fossil) 1.00 2.18 × 10 5
USES 1.0 terrestrial ecotoxicity (g equiv. 1-4-
6.06 × 10 6
dichlorobenzene)
(a) Lead (Pb) 1.10 × 10 4 1.5 × 10 6
(a) Mercury (Hg) 1.30 × 10 7 4.47 × 10 6
(a): air emission; (w): water emission.

8.4.4.1 Impact Pathway Analysis Applied to the Energy
Generation in the Industrial Separation Process
The site-specific environmental assessment has been carried out using the Ecosense
model, which was developed to support the assessment of priority impacts resulting
from the exposure to airborne pollutants, namely, impacts on health, crops, building
materials, and ecosystems as described in Chapter 4.
To cover different pollutants and different scales, Ecosense provides two air
transport models completely integrated into the system.
All input data required to run the windrose trajectory model (WTM) are provided
by the Ecosense database. A set of site-specific meteorological data must be added
by the user to perform the ISCST-2 model. The results of the air dispersion model
rely on four basic data sets: 1) meteorological conditions; 2) facility characteristics;
3) location of buildings near the emission sources; and 4) location of receptors

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